The Jimingsansheng Bridge, meaning "cock crow heard in three provinces", completed its main arch on July 7 after three years of construction.
The 170-meter high, 180-meter span bridge, is near a tripoint in Southwest China's Sichuan, Yunnan and Guizhou.
After completion, the bridge will give residents a shortcut across the river, which will cut their travel time from 150 minutes to 1 minute.
Scheduled to be completed by the end of this year, the bridge is expected to make great contribution to the poverty alleviation and economic development in the mountainous region.
(Video edited, text compiled by Huang Jingjing)